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https://issues.apache.org/jira/browse/HBASE-823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12657985#action_12657985
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stack commented on HBASE-823:
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Need new file format to be able to do stuff like limit indices or to store them
in soft references.
> Concurrent "open mapfile reader" limit
> --------------------------------------
>
> Key: HBASE-823
> URL: https://issues.apache.org/jira/browse/HBASE-823
> Project: Hadoop HBase
> Issue Type: Improvement
> Reporter: stack
>
> Over in HBASE-745, Luo Ning profiling found that the number of open Readers
> has direct impact on memory used. This issue is about putting an upper bound
> on the number of open Readers doing something like a bounded pool w/ a LRU
> eviction policy.
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